The Secret Service's new Twitter feed: what to expect from this most clandestine of tweeting agencies.

Tackling a Person of Interest

What to expect from the Secret Service's new Twitter feed.

This week, a new federal agency took to Twitter: the United States Secret Service. Slate has managed to secure a preview of upcoming, soon-to-be-declassified content from this most clandestine of tweeting agencies—for your eyes only.